astro.wikisort.org - StarGliese 3293 is a star in the constellation of Eridanus, that is orbited by four planets, two of which (Gliese 3293b/Gliese 3293d) are located within the star's habitable zone. It is located at the celestial coordinates: Right Ascension 04h 28m 35.7s, Declination −25° 10′ 09″.[1] With an apparent visual magnitude of 11.96,[5] this star is too faint to be seen with the naked eye. It can be viewed with a telescope having an aperture of at least 4 in (10 cm). The estimated distance to Gliese 3293 is 65.9 light-years (20.2 parsecs), based on its stellar parallax.[2] Gliese 3293 is significantly smaller and cooler than the Sun.[1]
Star in the constellation Eridanus
Gliese 3293
Observation data Epoch J2000 Equinox J2000 |
Constellation |
Eridanus[1] |
Right ascension |
04h 28m 35.71917s[2] |
Declination |
−25° 10′ 09.2978″[2] |
Apparent magnitude (V) |
11.96[3] |
Characteristics |
Spectral type |
M2.5[3] |
Astrometry |
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Radial velocity (Rv) | 13.116 ± 0.0024[4] km/s |
Proper motion (μ) | RA: −81.426[2] mas/yr Dec.: −485.473[2] mas/yr |
Parallax (π) | 49.4999 ± 0.0525 mas[2] |
Distance | 65.89 ± 0.07 ly (20.20 ± 0.02 pc) |
Absolute magnitude (MV) | 10.66[1] |
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Details |
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Mass | 0.420[1] M☉ |
Radius | 0.40 ± 0.03[1] R☉ |
Luminosity | 0.022[1] L☉ |
Temperature | 3466 ± 49[1] K |
Metallicity [Fe/H] | 0.02 ± 0.09[1] dex |
Rotational velocity (v sin i) | −25.9 ± 6.6[1] km/s |
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Other designations |
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GJ 3293, [3] LHS 1672, [5] 2MASS J04283571-2510088, Gaia DR2 4893118771316702720 |
Database references |
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SIMBAD | data |
ARICNS | data |
Planetary system
On November 15, 2017, it was discovered that Gliese 3293 possessed four planets, two of which were located well within the habitable zone: Gliese 3293b and Gliese 3293d.[6]
The Gliese 3293 planetary system[6]
Companion (in order from star) |
Mass |
Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
Inclination |
Radius |
e |
3.28±064 M🜨 |
0.08208 |
13.2543 |
0.21 |
— |
— |
b |
23.54 M🜨 |
0.1434 |
30.6 |
0.06±0.04 |
— |
— |
d |
7.60±1.05 M🜨 |
0.1939 |
48.14±0.12 |
0.12 |
— |
— |
c |
21.09 M🜨 |
0.364 |
123.98 |
0.11 |
— |
— |
References
- Astudillo-Defru, Nicola; Bonfils, Xavier; Delfosse, Xavier; Ségransan, Damien; Forveille, Thierry; Bouchy, François; Gillon, Michaël; Lovis, Christophe; Mayor, Michel; Neves, Vasco; Pepe, Francesco; Perrier, Christian; Queloz, Didier; Rojo, Patricio; Santos, Nuno C.; Udry, Stéphane (2015). "Planetary systems and stellar activity of the M dwarfs GJ 3293, GJ 3341, and GJ 3543". Astronomy & Astrophysics. 575: A119. arXiv:1411.7048v1. Bibcode:2015A&A...575A.119A. doi:10.1051/0004-6361/201424253. S2CID 67754095.
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "Gliese 3293", Open Exoplanet Catalogue, MIT, retrieved 2016-08-11
- Soubiran, C.; Jasniewicz, G.; Chemin, L.; Zurbach, C.; Brouillet, N.; Panuzzo, P.; Sartoretti, P.; Katz, D.; Le Campion, J. -F.; Marchal, O.; Hestroffer, D.; Thévenin, F.; Crifo, F.; Udry, S.; Cropper, M.; Seabroke, G.; Viala, Y.; Benson, K.; Blomme, R.; Jean-Antoine, A.; Huckle, H.; Smith, M.; Baker, S. G.; Damerdji, Y.; Dolding, C.; Frémat, Y.; Gosset, E.; Guerrier, A.; Guy, L. P.; et al. (2018). "Gaia Data Release 2. The catalogue of radial velocity standard stars". Astronomy and Astrophysics. 616: A7. arXiv:1804.09370. Bibcode:2018A&A...616A...7S. doi:10.1051/0004-6361/201832795.
- "GJ 3293 -- High proper-motion Star", SIMBAD, Centre de Données astronomiques de Strasbourg, retrieved 2011-12-08
- Astudillo-Defru, Nicola; Forveille, Thierry; Bonfils, Xavier; Ségransan, Damien; Bouchy, François; Delfosse, Xavier; et al. (2017). "The HARPS search for southern extra-solar planets. XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293". Astronomy and Astrophysics. 602. A88. arXiv:1703.05386. Bibcode:2017A&A...602A..88A. doi:10.1051/0004-6361/201630153. S2CID 119418595.
Constellation of Eridanus |
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